<template>
  <div :class="['xiaobu-loading-mask', show ? 'show' : 'hide']" v-show="show" @scroll.stop>
    <div class="loading-wrapper">
      <span class="loading-dot loading-dot-spin">
        <i></i>
        <i></i>
        <i></i>
        <i></i>
      </span>
    </div>
  </div>
</template>

<script>
export default {
  name: "Loading",
  computed: {
    show() {
      return this.$store.state.app.showLoading
    }
  }
}
</script>

<style lang="scss" scoped>
  .xiaobu-loading-mask {
    position: fixed;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    user-select: none;
    z-index: 9999;
    overflow: hidden
  }

  .loading-wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -100%)
  }

  .loading-dot {
    animation: antRotate 1.2s infinite linear;
    transform: rotate(45deg);
    position: relative;
    display: inline-block;
    font-size: 64px;
    width: 37px;
    height: 37px;
    box-sizing: border-box
  }

  .loading-dot i {
    width: 15px;
    height: 15px;
    position: absolute;
    display: block;
    background: #4077F4;
    border-radius: 100%;
    transform: scale(.75);
    transform-origin: 50% 50%;
    opacity: .3;
    animation: antSpinMove 1s infinite linear alternate
  }

  .loading-dot i:nth-child(1) {
    top: 0;
    left: 0
  }

  .loading-dot i:nth-child(2) {
    top: 0;
    right: 0;
    -webkit-animation-delay: .4s;
    animation-delay: .4s
  }

  .loading-dot i:nth-child(3) {
    right: 0;
    bottom: 0;
    -webkit-animation-delay: .8s;
    animation-delay: .8s
  }

  .loading-dot i:nth-child(4) {
    bottom: 0;
    left: 0;
    -webkit-animation-delay: 1.2s;
    animation-delay: 1.2s
  }

  @keyframes antRotate {
    to {
      -webkit-transform: rotate(405deg);
      transform: rotate(405deg)
    }
  }

  @-webkit-keyframes antRotate {
    to {
      -webkit-transform: rotate(405deg);
      transform: rotate(405deg)
    }
  }

  @keyframes antSpinMove {
    to {
      opacity: 1
    }
  }

  @-webkit-keyframes antSpinMove {
    to {
      opacity: 1
    }
  }
</style>